/*
  Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/C++ is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
  MySQL Connectors. There are special exceptions to the terms and
  conditions of the GPLv2 as it is applied to this software, see the
  FLOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published
  by the Free Software Foundation; version 2 of the License.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include <stdlib.h>
#include <stdio.h>
#include <memory>
#include <stdarg.h>
#include <string.h>
#include "mysql_debug.h"

#define NON_WANTED_FUNCTIONS 	!strstr(func, "Closed") \
								&& !strstr(func, "Valid") \
								&& !strstr(func, "getMySQLHandle") \
								&& !strstr(func, "isBeforeFirstOrAfterLast")


namespace sql
{
    namespace mysql
    {


        /* {{{ MySQL_DebugEnterEvent::MySQL_DebugEnterEvent() -I- */
        MySQL_DebugEnterEvent::MySQL_DebugEnterEvent(unsigned int l, const char* const f,
                const char* const func_name,
                const boost::shared_ptr< MySQL_DebugLogger > & logger_object)
            : line(l), file(f), func(func_name), logger(logger_object)
        {
            if (logger) {
                if (NON_WANTED_FUNCTIONS) {
                    logger->enter(this);
                }
            }
        }
        /* }}} */


        /* {{{ MySQL_DebugEnterEvent::MySQL_DebugEnterEvent() -I- */
        MySQL_DebugEnterEvent::~MySQL_DebugEnterEvent()
        {
            if (logger) {
                if (NON_WANTED_FUNCTIONS) {
                    logger->leave(this);
                }
            }
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::MySQL_DebugLogger() -I- */
        MySQL_DebugLogger::MySQL_DebugLogger()
            : tracing(NO_TRACE)
        {
            // ToDo: On Win getenv() is not thread-safe !
            if (getenv("MYSQLCPPCONN_TRACE_ENABLED")) {
                tracing = NORMAL_TRACE;
            }
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::~MySQL_DebugLogger() -I- */
        MySQL_DebugLogger::~MySQL_DebugLogger()
        {
            callStack.empty();
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::disableTracing() -I- */
        void
        MySQL_DebugLogger::disableTracing()
        {
            tracing = NO_TRACE;
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::enableTracing() -I- */
        void
        MySQL_DebugLogger::enableTracing()
        {
            tracing = NORMAL_TRACE;
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::enter() -I- */
        void
        MySQL_DebugLogger::enter(const MySQL_DebugEnterEvent* event)
        {
            if (tracing != NO_TRACE) {
                printf("#\t");
                for (unsigned int i = 0; i < callStack.size(); ++i) {
                    printf("|  ");
                }
                printf(">%s\n", event->func);
            }
            callStack.push(event);
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::isTracing() -I- */
        bool
        MySQL_DebugLogger::isTracing()
        {
            return (tracing != NO_TRACE);
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::leave() -I- */
        void
        MySQL_DebugLogger::leave(const MySQL_DebugEnterEvent* event)
        {
            callStack.pop();
            if (tracing != NO_TRACE) {
                printf("#\t");
                for (unsigned int i = 0; i < callStack.size(); ++i) {
                    printf("|  ");
                }
                printf("<%s\n", event->func);
            }
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::log() -I- */
        void
        MySQL_DebugLogger::log(const char* const type, const char* const message)
        {
            if (tracing == NO_TRACE) {
                return;
            }
            printf("#\t");
            for (unsigned int i = 0; i < callStack.size(); ++i) {
                printf("|  ");
            }
            printf("%s: ", type);
            printf("%s\n", message);
        }
        /* }}} */


        /* {{{ MySQL_DebugLogger::log_va() -I- */
        void
        MySQL_DebugLogger::log_va(const char* const type, const char* const format, ...)
        {
            if (tracing == NO_TRACE) {
                return;
            }
            va_list args;
            printf("#\t");
            for (unsigned int i = 0; i < callStack.size(); ++i) {
                printf("|  ");
            }
            printf("%s: ", type);
            va_start(args, format);
            vprintf(format, args);
            va_end(args);
            printf("\n");
        }
        /* }}} */

    } /* namespace mysql */
} /* namespace sql */

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: noet sw=4 ts=4 fdm=marker
 * vim<600: noet sw=4 ts=4
 */
